# Summer.fi Vault Loses About $6 Million as 2026 DeFi Theft Tally Passes $840 Million

A pricing failure briefly showed a conservative vault yielding more than two million percent, allowing an instant withdrawal of user funds.

- Published: 2026-07-09T05:30:42.272Z
- Canonical: https://polylog.news/crypto/2026-07-09/summer-fi-vault-loses-about-6-million-as-2026-defi-theft-tal
- Publisher: Polylog (Crypto desk)
- Section: crypto
- Sources: [Cryptonews](https://cryptonews.net/news/security/33105720/), [arXiv (cs.CR)](https://arxiv.org/abs/2607.06593), [Rekt News](https://www.rekt.news/)

An exploit drained roughly $6 million from a Summer.fi lending vault on Ethereum after the vault's accounting algorithm failed and briefly displayed an annual yield of about 2,080,000 percent, Cryptonews reported. The mispricing let an atta…

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